We propose a novel scheme to realize unicast and multicast in WDM-PON. Unicast data and multicast data are modulated in DPSK format and ASK format respectively. Reflective semiconductor optical amplifier is used to se...
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Waveband switching (WBS) is proposed as a promising technique to reduce the number of switching ports, which could translate to the switching fabric size and cost of the nodes in the dense wavelength division multiple...
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ISBN:
(纸本)081946449X
Waveband switching (WBS) is proposed as a promising technique to reduce the number of switching ports, which could translate to the switching fabric size and cost of the nodes in the dense wavelength division multiplexing (DWDM) network. We propose a routing and wavelength/waveband (RWA) heuristic algorithm, called Maximize the Number of Waveband Route (MNWR) for the dynamic arriving traffic demands in the multi-granularity WBS opticalnetwork. We study the performance of various MG-OXC architectures including the serial three-stage MG-OXC and the interconnecting three-stage MG-OXC proposed by our group employing the on-line MNWR algorithm. Simulation results indicate that the interconnecting three-stage MG-OXC outperforms the serial three-stage architecture in terms of blocking performance for dynamic requests.
This paper proposes V-STONES: a new circuit provisioning model for future Grid applications. V-STONES differs from existing circuits provisioning model in that it allows end hosts to establish more than one connectivi...
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ISBN:
(纸本)1424418593
This paper proposes V-STONES: a new circuit provisioning model for future Grid applications. V-STONES differs from existing circuits provisioning model in that it allows end hosts to establish more than one connectivity concurrently with multiple remote systems thus can be used in more complex E-Science application scenarios.
The shape of the Web in terms of its graphical structure has been a widely interested topic. Two graphs, Bow Tie and Daisy, have stood out from previous research. In this work, we take a different approach, by viewing...
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ISBN:
(纸本)9781605580852
The shape of the Web in terms of its graphical structure has been a widely interested topic. Two graphs, Bow Tie and Daisy, have stood out from previous research. In this work, we take a different approach, by viewing the Web as a hierarchy of three levels, namely page level, host level, and domain level. Such structures are analyzed and compared with a snapshot of Chinese Web in early 2006, involving 830 million pages, 17 million hosts, and 0.8 million domains. Some interesting results have emerged. For example, the Chinese Web appears more like a teapot (with a large size of SCC, a medium size of IN and a small size of OUT) at page level than the classic bow tie or daisy shape. Some challenging phenomena are also observed. For example, the INs become much smaller than OUTs at host and domain levels. Future work will tackle these puzzles.
An unsymmetrical quantum key distribution protocol is proposed, in which Greenherger-Horne-Zeilinger （GHZ） triplet states are used to obtain the secret key. Except the lost qubits due to the unperfectness of the phy...
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An unsymmetrical quantum key distribution protocol is proposed, in which Greenherger-Horne-Zeilinger （GHZ） triplet states are used to obtain the secret key. Except the lost qubits due to the unperfectness of the physical devices, the unsymmetrical characteristic makes all transmitted qubits useful. This leads to：an excellent efficiency, which reaches 100% in an ideal case. The ＇security is studied from the aspect of information theory. By using the correlation of the GHZ tripartite entanglement state, eavesdropping can be easily checked out, which indicates that the presented protocol is more secure.
The interpolatory edge operator is applied to the recognition of cotton and ramie fibers. Its performance is studied in comparison with the Canny edge operator in the fiber’s edge detection for cross-sectional image....
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The interpolatory edge operator is applied to the recognition of cotton and ramie fibers. Its performance is studied in comparison with the Canny edge operator in the fiber’s edge detection for cross-sectional image. The input image is interpolated other than Gaussian function smoothing. The quality of edge output is improved by the interpolatory edge operator. It produces edge output with good continuity for low-resolution input. The fine edge output, such as cross-markings, can be distinguished clearly, so the interpolatory edge operator is suitable for the study of cotton and ramie fibers. Furthermore, the application of the interpolatory edge operator can cut the hardware cost, reduce the storage and speed up the data transmission.
We propose two inter-carrier interference (ICI) self-cancellation schemes based on CO-OFDM system. They can not only enhance the laser linewidth tolerance of the system, but also improve the robustness against fiber n...
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ISBN:
(纸本)9784885522451
We propose two inter-carrier interference (ICI) self-cancellation schemes based on CO-OFDM system. They can not only enhance the laser linewidth tolerance of the system, but also improve the robustness against fiber nonlinearity.
We compare the transmission performances of CO-SCFDE and CO-OFDM systems with the same system setup and almost the same DSP methods except the IFFT processing. Both CD and SPM tolerances are investigated.
ISBN:
(纸本)9784885522451
We compare the transmission performances of CO-SCFDE and CO-OFDM systems with the same system setup and almost the same DSP methods except the IFFT processing. Both CD and SPM tolerances are investigated.
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